Oviposition-deterring Pheromone Research Articles

Oviposition-deterring pheromone ofRhagoletis pomonella

We found that after the parasitoidOpius lectus has arrived on a fruit infested by eggs or early-instar larvae of its tephritid hostRhagoletis pomonella, the following stimuli act to retain it and elicit antennal tapping and oviposition probes: unidentified fruit chemical components; characteristic fruit shape, size and color; andR. pomonella oviposition-deterring pheromone. This is the first demonstration of an oviposition-deterring pheromone in a phytophagous insect serving as a kairomone to one of its parasitoids.O. alloeus, a parasitoid of lateinstar larvae ofR. pomonella, was not influenced by the pheromone. Possible use of the pheromone for management ofO. lectus in a multifacetedR. pomonella suppression program is discussed.

Location of Receptors for Oviposition-Deterring Pheromone in Rhagoletis pomonella Flies 2

Through structural ablation, we demonstrated that also be present on the mid and hind tarsi, but are not receptors of oviposition-deterring fruit marking pheromone in Rhagoletis pomonella (Walsh) flies are located on the fore tarsi. Additional receptors may present in behaviorally detectable numbers on the antennae, mouthparts, or ovipositor.

First Field Application of Oviposition-deterring Marking Pheromone of European Cherry Fruit Fly 1

Solutions of an oviposition-deterring pheromone produced by females of Rhagoletis cerasi L. were collected in the laboratory, partly purified and sprayed on cherries during their susceptible stage for oviposition. Despite heavy rainfalls during the experiment, infestation of treated cherries could be reduced by 77.6% compared with untreated controls.